Improvement in wash-boards



C. Gf'lGRIDLEY xn (LW. PRATT.

Wash-Board, l

Patented Aug. 26, 1879.-

I l m N4 PETERS, FHOTO-L|THOGRAPHER UNITED STATES PATENTUEEIGE,

CHARLES C. GRIDLEY AND CHARLES W.PRATT, OFv WATERLOO, N. Y.

IMPROVEMENT IN WASH-BOARDS.

. Specication forming part of Letters Patent No. 218,959, dated August26, 1879; application filed June 22, 1878.

To all whom it may concer/n: 4

Be it known that we, CHARLES C. GRIDLEY and CHARLES W. PRATT, both ofWaterloo, in the county of Seneca and State of New York, have invented acertainy new and useful Improvement in Wash-Boards; and we do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, in which-Figure l is a face view of the wash-board. Fig. 2 is a similar "view ofa fragment of the board on a larger scale. Fig. 3 is a perspective viewof the same.

Ourimprovement relates to zinc Wash-boards which are corrugated byrunning the sheet between crimpingrollers.

In forming our improved board we pass the sheet twice throughrollers-first angularly through a pair off fine rollers, which produce adiagonal channeling of the sheet from corner to corner, and next throughthe ordinary rollers, which oorrugate or crimp the board crosswise, inthe usual manner. By this means a peculiar surface is formed on theboard, by which it is cut up into a `series of parallelograms, followingeach other in order on opposite sides of the transverse crimps, saidparallelograms being separated by the diagonal channels beforedescribed, the whole presenting a checkered and iinely-diversiedsurface, thereby producing a very effective rubbing-surface.

A is the frame, and B the zinc sheet forming the wash-board. b b are thediagonal corrugations or channels. These are produced by running thesheet ofzinc diagonally through a pair of fine crimping-rollers, saidcorrugationsextending in the direction from one corner to the other, thesame being narrow and comparatively shallow. a. a are the ordinarytransverse crimps. These are formed by running the sheet, alreadydiagonally corrugated, through the ordinary crimping rollers, and are ofcomparatively large size.

By t-he means above described a series of parallelograms, c c c, areformed on each side of the transverse crimps, which follow each other inorder, and those on one side alternating or breaking joints with thoseon the other side, and allot' said tigures being separated by thediagonal ribs or corrugations b, which present, in cross-section, suchangles to the parallelograms as will form V-shaped channels betweenthem.

By the means above described the surface is greatly diversified and cutup into a great number of diamond-shaped angles, each of which presentsa rubbing-surface to the clothes which is effective in operation.

The great facility with which the board is made, by simply passing itthrough the two sets of rollers, renders it nearly as cheap as thecommon board, the only extra expense being the labor of running itthrough the rst set of rollers. This process also renders the boardstronger, as continuous sharp edges of the transverse corrugations,which soon crack, are avoided. Greater stiffness and solidity of theboard are also attained.

The board may be made either single or double faced, and either plain orwith a milled center, as` may be desired.

We are aware that wash-boards have been made with diagonal corrugationscrossingeach other and forming diamond-shaped protuberances; alsowash-boards transversely corrugated and stamped with zigzag ribs; but insuch cases the board has been stamped or struck up in contradistinctionto rolling. Such we do not claim. What we claim as new is Y As a newarticle of manufacture, a washboard having a sheet-metalrubbing-surface, constructed with diagonal ribs extending from corner tocorner, and transverse crimps formi ingplain parallelogrammic guresbetween the crimps, which are separated from the diagonal ribs byV-shaped channels, all as herein shown v and described.

In witness whereof we have hereunto slgned our names in the presence oftwo subscr1b1n g witnesses.

CHAS. C. GRIDLEY. CEAS. W. PRATT. Witnesses:

M. D. MERCER, WM. L. MERCER.

